CN1893654A - Video signal transmission method and video processing system - Google Patents
Video signal transmission method and video processing system Download PDFInfo
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- CN1893654A CN1893654A CNA2006100946771A CN200610094677A CN1893654A CN 1893654 A CN1893654 A CN 1893654A CN A2006100946771 A CNA2006100946771 A CN A2006100946771A CN 200610094677 A CN200610094677 A CN 200610094677A CN 1893654 A CN1893654 A CN 1893654A
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Abstract
The present invention is intended to permit both real-time display of a picture represented by a non-compressed video signal on a television and display of a picture represented by a compressed video signal at any desired time by simultaneously transmitting the compressed video signal and non-compressed video signal via one interface. An STB 11 packetizes a compressed video signal, and multiplexes the compressed video signal and a blanking signal combined with a non-compressed video signal. Thus, both the video signals are transmitted simultaneously. A picture represented by the non-compressed video signal is displayed on a television 12 in real time. The compressed video signal is stored in a storage medium 128 incorporated in the television, read at any user's desired time, and decoded so that a picture represented by the compressed video signal can be viewed at the user's desired time.
Description
Technical field
The present invention relates to the transmission method of digital image signal and be used to receive for example image processor such as STB of digital image signal (set-top box Set top box) or TV pick-up attacnment.
Background technology
Because what the HD (High Definition) that utilizes ground wave digital broadcasting to carry out broadcasted popularizes, with selling of blue light (Blu-ray) tape deck that can record a video to HD broadcasting, thereby to can increasing to the demand of digital image interface (Digital Video Interface) that the harmless image quality of TV ground transmits the HD image of high image quality.Digital Visual Interface) and HDMI, the LLC HDMI (high-definition media interface: High Definition Multimedia Interface) of permitting as the interface of non-compressing image signal transmission (non-compressed video signal transmitting), the DVI that DDWG formulates (Digital Visual Interface: is arranged.In addition, the interface as the signal of video signal by compressions such as MPEG being transmitted usefulness has IEEE1394 and LAN etc.As the prior art of the interface that in television equipment, uses the non-compressing image signal of transmission, for example put down in writing in the non-patent literature 1.It discloses in the non-compressing image signal of not subpackage, divides the format information that is surrounded by image, and the method for carrying out multiplexed transmission.In addition, in HDMI, also divide and be surrounded by voice data and transmit.As the prior art of the interface that uses the transmission of compressing image signal in television equipment, for example non-patent literature 2 is put down in writing.In addition; example as their employed copyright protection technology; for non-compressing image; HDCP (HDCP: High-bandwidth Digital Content ProtectionSystem) is arranged; for compressing image, DTCP (DTCP: DigitalTransmission Content Protection) is arranged.
In addition, with the subpackage (packetize) respectively of non-compressing image signal and compressing image signal, (the serial digital data interface: mode Serial Digital DataInterface), for example patent documentation 1 is put down in writing to carry out the SDDI of serial transmission simultaneously.
Patent documentation 1: the spy opens flat 8-307455 communique
Non-patent literature 1: standard book " CEA-861-B " U.S. CE A 2002
Non-patent literature 2: standard book " CEA-775-B " U.S. CE A 2004
From now on, the kind of anticipation signal source will increase, and TV needs the situation of the input interface of non-compressing image signal and compressing image signal to increase., under two kinds of interfaces that connector is different are arranged on situation on the television equipment (television receiver etc.), are necessary to guarantee connector space and prepare two kinds of cables.Though patent documentation 1 discloses the mode of transmitting non-compressing image signal and compressing image signal simultaneously, this is the transmission means that is applicable to the broadcasting station.Be the transmission means of record in the patent documentation 1, because non-compressing image signal is carried out subpackage, so be difficult to it is applied to television equipment towards general family.
Corresponding to the kind of employed interface, the kind of the copyright protection technology of use also increases in addition.Under these circumstances, also need suitably corresponding with the copyright protection technology.
The present invention finishes in view of above-mentioned problem, and its purpose is to provide a kind of technology of transmitting the interface of non-compressing image signal and compressing image signal.Another object of the present invention is to provide a kind of energy to be fit to the technology of copyright protection in addition.
Summary of the invention
In order to achieve the above object, in the present invention, be characterised in that: the compressing image signal to input is decoded, and generates non-compressing image signal; Sending behind the multiplexed compressing image signal on the retrace interval part of this non-compressing image signal.The invention is characterized in addition: on the non-compressing image signal of the not subpackage that comprises synchronizing signal, send behind the compressing image signal after the multiplexed subpackage.According to said structure, then available a kind of interface transmits the compressing image signal of for example stipulating the non-compressing image signal of transmission means with specifications such as DVI or HDMI and for example stipulating transmission means with specifications such as IEEE1394.Therefore, do not need to guarantee two connector spaces and prepare two kinds of cables, can reduce cost.
Second of the present invention in addition is characterised in that: can implement multiple encryption to the signal of video signal that is sent or received by interface, can select in the above-mentioned a plurality of encryption portion any one simultaneously.Also can respond after the encryption from user's change indication, carry out this selection.
If employing the present invention then can provide shared interface to non-compressing image signal and compressing image signal.In addition, the protection of the copyright of Shi Heing becomes possibility.
Description of drawings
Fig. 1 is the block diagram of first embodiment of expression image processor of the present invention;
Fig. 2 is the block diagram of a structure example of expression sending part of image processor and acceptance division;
Fig. 3 is an illustration of the branch pack arrangement of expression compressing image;
Fig. 4 is the block diagram of second embodiment of expression image processor of the present invention;
Fig. 5 is the block diagram of the 3rd embodiment of expression image processor of the present invention;
Fig. 6 is the block diagram that the signal of video signal of the image processor of expression the 3rd embodiment flows;
Fig. 7 is the output circuit of expression the 3rd embodiment and a structure illustration of input circuit;
Fig. 8 is the output circuit of expression image processor and the basic structure illustration of input circuit;
Fig. 9 is the block diagram of the 4th embodiment of expression image processor of the present invention;
Figure 10 is the output circuit of expression the 4th embodiment and a structure illustration of input circuit.
Embodiment
Below, with reference to accompanying drawing the preferred embodiments of the present invention are described.The present invention is the invention that utilizes shared (same) interface to transmit non-compressing image signal and compressing image signal simultaneously.And can keep mutual continuity with non-compressed word interfaces such as the DVI that begins to popularize or HDMI, realize above-mentioned transmission.In addition, in the embodiment of following explanation, image processor comprises (to call " TV " in the following text) such as the STB that for example is built-in with digital tuner or TV pick-up attacnment.Certainly, following embodiment also can be applicable to the device beyond these devices.
Embodiment 1
Fig. 1 is the block diagram of the first embodiment of the present invention, comprises STB (Set Top Box) 11 as an example of image processor, as another routine TV 12 of image processor and can be at the mobile display (mobile viewer) 13 of ground audio-visual images of going out.Below, their work example is described.
STB 11 receives the RF signal of supplying with from digital broadcasting or cable etc. 101, with the transport stream (hereinafter to be referred as TS) of digital tuner 111 demodulation compressing images.The TS of demodulation is in TS/PS transformation component 112, and extraction procedure stream (hereinafter to be referred as PS) obtains non-compressing image signal by lsb decoder 113.Non-compressing image signal and the OSD picture that generates in OSD portion 115 synthesize to this in the synthetic portion 114 of image.Not to this non-compressing image signal subpackage, and from sending part 117 via signal of video signal interface 103, be sent to the acceptance division 127 of TV 12.The non-compressing image signal that is received by acceptance division 127 sends to display part 129 by the synthetic portion 124 of image.Display part 129 shows real-time image frame based on this non-compressing image signal, offers the user.Control part 116 and 126 is not only controlled the multiplexed and communication conditions of sending part 117 and acceptance division 127 respectively, and transmit the display capabilities (about the characteristics showed and the specification of image) of TV 12 to STB 11, make the signal of video signal that sends from STB 11 consistent with the display characteristic of TV 12.In addition, can also carry out two-way communication control,, make the collaborative work of STB11 and TV 12 become possibility so that receive and dispatch remote control code etc. mutually.
On the other hand, also transmit the TS output of digital tuner 111 and the OSD output of OSD portion 115 to sending part 117.Sending part 117 is multiplexed in non-compressing image signal with the packetized data of TS and OSD, generates multiplexed signal of video signal, is sent to acceptance division 127 via interface 103.Acceptance division 127 separates non-compressing image signal and TS and OSD from the multiplexed signal of video signal that receives.To be stored in the storage part 128 by the TS and the OSD that separate in the acceptance division 127 or extract.This storage part 128 is made of for example hard disk.Also can constitute by fast storage semiconductor memories such as (flashmemory).Carry out photologging thus based on TS.According to user's indication, from the TS of storage part 128 playback records, in TS/PS transformation component 122, extract PS, utilize lsb decoder 123 to obtain non-compressing image signal.Simultaneously, as required, from storage part 128, read osd data, utilize OSD portion 125 to form incompressible OSD signal of video signal.This OSD signal of video signal carries out image with the non-compressing image signal of exporting from lsb decoder 123 and synthesizes in the synthetic portion 124 of image.Utilize the non-compressing image signal of display part 129 demonstrations and recording image and OSD, can carry out audiovisual (passage of time audiovisual) in user's desired time section.
In addition, if TV 12 installs digital tuners 121, then can with STB 11 receiving digital broadcast etc. similarly, utilize 128 pairs of these TS records of storage part, carry out the passage of time audiovisual.In addition, also can utilize non-compressing image signal that 124 pairs in the synthetic portion of image obtains by TS/PS transformation component 122 and lsb decoder 123 and synthesize, in display part 129, show two pictures simultaneously from the non-compressing image signal that STB 11 sends.Digital tuner 111 also can receive different channels with 121, and carries out two pictures and synthesize.In addition, it is synthetic also can to carry out two pictures to the image of image that utilizes the channel that the earthwave digital tuner receives and the channel that the closed-circuit television tuner receives.If STB 11 have with the TV 12 that is built in the band digital tuner in the different digital tuner 111 of digital tuner (can receive with the digital tuner of TV 12 the digital tuner of the channel that can not receive), then also have the effect that the channel that can realize can not receiving TV 12 carries out real-time audiovisual or passage of time audiovisual.In addition, also have take off STB 11 from TV 12 after, also can after utilizing STB to receive, be retained in the effect that the image in the storage part 128 carries out audiovisual.
As can be known, if digital tuner 111 can receive a plurality of channels simultaneously, then multiplexed compressing image signal also can be different programs with non-compressing image signal in sending part 117.In addition, it can not be TS also that sending part 117 carries out multiplexed compressing image data, but the PS after the TS/PS conversion.Compare with TS, PS has the few advantage of volume of transmitted data.
Be recorded in the compressing image signal in the storage part 128, can in transcoding, coding transform portion 130, carry out the transcoding, coding transform of more high compression and transmission form etc. after, interface 131, interface 104 and interface portion 132 by USB or IEEE1394 etc. transfer to storage part 138.After the signal of video signal transmission, mobile display 14 cuts off interface 104, can be carried into place arbitrarily.Mobile display 14 is decoded to the image that is stored in the storage part 138 in lsb decoder 133 according to user's indication then, shows in display part 139.Thus, the user uses the mobile display 14 can be at the desirable image of place audiovisual arbitrarily.
Fig. 2 is the block diagram of a structure example of expression sending part 117 and acceptance division 127.Its work example below is described.Will be corresponding to the voice data 202 of the non-compressing image that comes the synthetic portion 114 (Fig. 1) of self imaging, TS output 203 from digital tuner 111 (Fig. 1), and the osd data 204 of OSD portion 115 (Fig. 1), import the bag generating unit 211,212 and 213 of sending part 117 respectively.According to the signal of input, formation is adapted at carrying out multiplexed subpackage on the non-compressing image signal bag generating unit 211～213 respectively.Buffer part 214 receives the subpackage from bag generating unit 211～213, arranges according to the priority of subpackage output, and as one man sends successively during the tropic of non-compressing image signal.(error correction: Error CodeCorrection) encoding section 215, and the coding that error correction is used is inserted in the subpackage that is arranged in the buffer part 214 to utilize ECC.Then, in rearrangement portion 216, carry out the rearrangement of bit location and handle, improve adaptibility to response, send to multiplexed encoding section 217 sudden mistake.Multiplexed encoding section 217 comprises: in the non-compressing image signal output 201 that is coming the synthetic portion 114 (Fig. 1) of self imaging, the subpackage after the above-mentioned rearrangementization is carried out multiplexed multiplexed 401; Add the copy flag addition portion 402 of duplicating controlled flag that non-compressing image signal is used; Signal of video signal is encrypted the encryption portion (Cipher-Part) 403 of (Cipher); And the transmission encoding section 404 that transmits the coding of usefulness.The output signal of multiplexed encoding section 217 sends to the input circuit 228 of acceptance division 127 via output circuit 218 as multiplexed signal of video signal 207.
The multiplexed signal of video signal that input circuit 228 is received is sent to multiplexed lsb decoder 227.Multiplexed lsb decoder 227 comprises: to transmitting the transmission lsb decoder 411 of decoding with coding; Encryption to signal of video signal is deciphered the encryption of (decipher) and is deciphered portion 412; Extract the copy flag extraction unit 413 of copy flag; With the separated part 414 that other packetized data are separated with non-compressing image signal 201.Separate reset in the circuit 226 packetized data separated reset handle after, be reduced to original signal, utilize ECC lsb decoder 225 to carry out error correction after, send to buffer part 224.The buffer part 224 temporary transient packetized data that keep export subpackage lsb decoder 221～223 respectively to.221～223 pairs of packetized data from buffer part 224 of subpackage lsb decoder are decoded, and obtain voice data 292, TS (Transport Stream) 293 and OSD (the On Screen Display) data 294 of non-compressing image signal.Be in Fig. 1, to send to the data of storage part 128 with them from acceptance division 127.
Ability transfer part 229 will pass to ability identification part 219 about the information of the display capabilities (showing specification and/or display characteristic) that TV had by communication line 208.Ability identification part 219 is according to above-mentioned information about display capabilities, and the display capabilities of identification TV 12 is exported recognition result 205.Recognition result 205 is sent to control part 116 (Fig. 1).The image processing in the control part 116 control STB 11 or the key element of image output to send the image format of the ensuing TV of being suitable for 12, behind the display capabilities of having confirmed TV 12 sides, are sent the multiplexed signal of video signal of present embodiment simultaneously then.Utilize said structure, multiplexed signal of video signal need not be transferred to and not have the structure (TV that promptly has present interfaces) that to import multiplexed signal of video signal, and only export non-compressing image signal.Therefore, can guarantee and have the interconnecting property of the TV of present interfaces.As the structure of the ability of such transmission TV 12 sides, for example preferably use the EDID system of VESA regulation.In the present embodiment, the information about the display capabilities of above-mentioned TV for example comprises: the level of display part 129 and vertical resolution, color reproduction scope, gamma characteristic etc.In addition, in order to effectively utilize present embodiment, information as the display capabilities of above-mentioned TV, except above-mentioned, for example also can append transmission: the ability such as memory capacity, spatial capacity, dominant record speed of representing guide look, the storage part 128 of the bit rate of image format, the compressing image of the display timing generator of multiplexed signal of video signal, the coded system that can decode.
Except above-mentioned, ability transfer part 229 and ability identification part 219 also are used for the ability of device authentication or encryption and confirm.For example in DVI or HDMI,, digital content protection (Digital Content Protection) is arranged, the HDCP of LLC permission as encryption.From now on, in contents diversification, might need internally perhaps country origin to manage multiple encryption.Under these circumstances, in the present embodiment, receiver side at signal of video signal, be provided with the multiple key element that is used for device authentication or encryption, also can be provided with automatic identification selection circuit, be used for the agreement (protocol) that begins with reference to from the device authentication of transmitter side, discern and select any processing suitable.On the other hand, transmitter side is discerned the kind of content and the country of use etc., can be provided with the automatic identification selection circuit of selection and switching and its encryption that is fit to.For example, also can playback record region code in the DVD dish, and utilize this region code to select encryption.In addition, in television broadcasting, also can discern this broadcasting station, and select encryption.
According to country or practitioner's regulation, need to carry out the curing of encryption sometimes.Under these circumstances, if prepare special-purpose image processor again, then development cost can increase.Therefore, in image processor, be provided with a plurality of encryption portions that carry out multiple encryption, can be provided with, the kind that identification is encrypted, and the identification selection circuit of selection and the corresponding encryption of this recognition result portion.At this moment, the identification selection circuit also can automatically be discerned the kind of encryption, carries out selection work.In addition, also can be provided with and be used for the initialization circuit that to set the kind of encryption by the user.In addition, according to the circuit of this setting, can when dispatching from the factory, preestablish and solidify in a plurality of encryptions.At this moment, according to this initialization circuit, also can be for the related formality of the setting of user cipher device encryption change (for example, the order relative or the input of password etc.), so that the user can not arbitrarily set change to the kind of encryption with STB 11 and TV 12.After dispatching from the factory, under the situation of setting of change encryption, make its can be under given conditions the bill of user's expense (for example from), download formality about above-mentioned setting change from for example broadcasting and/or internet etc.So, make maintain secrecy in the above-mentioned setting change formality, open to the user under given conditions, make the change of the encryption that determines by the user effective.When implementing present embodiment, also can provide above-mentioned service.In addition, also can be in advance the related formality of above-mentioned setting change be stored in the medium such as DVD, it is distributed to the user as setting change with DVD.
In addition, under the situation of using various encryptions, can be according to the grade of encryption, the setting restrictions such as bit rate to resolution or compressing image signal change picture quality.
The output that subpackage in the above-mentioned buffer part 214 below is described is handled, and promptly arranges according to the subpackage of priority and handles.Be multiplexed on the non-compressing image signal and the transmission capacity of the subpackage that sends restricted.The subpackage of answering override to send is an audio frequency synchronous with image, that need the non-compressing image signal of real-time regeneration.Therefore, as the highest, override determines its configuration with the priority of the audio frequency subpackage of this non-compressing image signal.In remaining areas, configuration compressing image subpackage and OSD subpackage.Though the priority of compressing image subpackage and OSD subpackage sets arbitrarily that under the situation of OSD and non-compressing image signal association (perhaps its relevance height), the priority specific pressure epitome that also can make the OSD subpackage is as the subpackage height.Under the high situation of the necessity of the utilization of the compressing image in TV 12, the priority that also can make the compressing image subpackage is than OSD subpackage height.
Compressing image is being sent under the situation of storage part 128, be necessary to dispose subpackage, so that be no more than the dominant record speed of this storage part 128.Perhaps, also can carry out flow process control, control subpackage output variable with communication line 209.Under the situation of the compressing image of roughly regenerating in real time with TV 12, be necessary to adopt the subpackage output variable control of the coding rate that is fit to compressing image.
In addition, the difference according to the form of non-compressing image signal is used to the subpackage transmittability deficiency that makes the compressing image signal multiplexed sometimes.In the case, also can use pixel clock to be made as n doubly (n is more than 2), perhaps make the form of the retrace interval expansion of non-compressing image signal non-compressing image signal.So, then can improve the subpackage transmittability of compressing image signal.
Fig. 3 is the figure of an example of the branch pack arrangement of expression compressing image.As shown in Figure 3, the subpackage of TS is by the head of 4 bytes and 188 bytes formations of total of 184 bytes adaptive (adaptation) (or pay(useful) load).On the other hand, in order to make TS multiplexed in the gap of non-compressing image signal (for example retrace interval), preferred subpackage size is little.Figure 3 illustrates with the head of 3 bytes and the situation of the pay(useful) load of 28 bytes formation subpackage.Also the pay(useful) load that 188 bytes of TS subpackage can be divided into 7 compressing image subpackages is transmitted.
One example of head-coating structure below is described.The subpackage kind of the first byte representation compressing image or audio frequency etc.Second byte and the 3rd byte add up to 16, and sequence number (3), the TS that can distribute to the TS subpackage that is divided into 7 divide packet number (11) and duplicate controlled flag (2).TS itself adds time stamp, and according to the situation of using it, the above-mentioned TS that also can omit in the head divides 11 of packet number, is more convenient for using but be documented in head.With the identiflication number that this TS divides packet number to use as the identification subpackage, the re-send request may subpackage when carrying out above-mentioned error of transmission generation is specified.
For example under situation, transmit the TS subpackage of 10.6 ten thousand 188 bytes in 1 second with 20Mbps transmission HD image.Carry out under the situation of regeneration request at transmitter side when error of transmission takes place, suppose the speed slow (being that transmission rate is low) of communication line 209, the transmission of error message needs 100mS, needs the TS that discerns 10,000 TS bytes to divide packet number at least.That is, because TS divides 14 of packet number needs, 11 deficiencies of head.On the other hand, as shown in the figure, 8 null bytes are arranged in the pay(useful) load of the 7th compressing image subpackage.Therefore, a byte in this dead zone can be used for putting down in writing not enough TS and divide packet number.Certainly, as required, also can use 2～3 bytes.In addition, copy flag also can the head and be documented in this dead zone.In the zone, have under the situation of enough and to spare, also can put down in writing number of copy times, transmission back and allow the storage binding hours of passage of time audiovisual and/or CGMS-D etc.Putting down in writing a plurality of information in addition if desired, is not 7, but a TS subpackage is distributed in 8 compressing image subpackages.
Embodiment 2
Fig. 4 is the block diagram of expression an alternative embodiment of the invention.Present embodiment is in system configuration shown in Figure 1, and sending part 117 and acceptance division 127 are changed to the sending part 230 among Fig. 4 and the embodiment of acceptance division 250 respectively.In the present embodiment, sending part 230 and acceptance division 250 usefulness comprise that the interface of the clock line 274 of 3 data wires 271,272,273 that send signal of video signal and tranmitting data register signal is connected to each other.Article 3, data wire for example is used for the transmission of red, green, blue non-compressing image signal separately.Clock line is the line of the reference clock used of transmission Data Receiving.Data wire is passing through to send 10 data in the clock cycle of clock line in addition.Multiplexed encoding section 231～233 and 235, output circuit 241～244, input circuit 251～254, multiplexed lsb decoder 261～264 are equivalent to multiplexed encoding section 217, output circuit 218, input circuit 228, the multiplexed lsb decoder 227 among Fig. 2 respectively, and its detailed description is omitted.In addition, omit explanation here for other blocks shown in Figure 2.
When the situation of switch 245 selection clock supply units 234, suitable with embodiment shown in Figure 2.In the present embodiment, when needing the high speed of image data transmission, switch 245 is switched to multiplexed encoding section 235, clock line is also as data wire usefulness, and the transmission quantity that makes image data is 4/3 times.In the case, the reference clock of using in TV 12 sides regeneration input data is not the clock signal that sends with clock line, can be used for extracting reference clock from the signal of each data wire yet.For this reason, the whole of each input circuit 251～254 or at least one received signal are imported PLL256, get final product from input data extract clock-pulse component.In order to extract clock-pulse component, can be with band pass filter etc. and combinations such as PLL.Certainly, PLL also can replace with DLL.
So, various forms are arranged in the image data, reference clock is more.As mentioned above,, be necessary the detection reference clock cycle exactly, need the plenty of time for this reason from data wire extraction clock and under with its situation about using as reference clock.In the present embodiment, switch 245 is selected clock supply units 235 under initial condition, by clock line 274 in the future the reference clock of self-clock supply unit 235 be transferred to acceptance division 250.Thus, can easily give acceptance division 250 with the reference clock periodic transfer.Therefore, if adopt present embodiment, then has the effect that can shorten the time that the initial setting relevant with the reference clock cycle use.
If adopt the information about the display capabilities of TV 12 that will illustrate with mode shown in Figure 2 to pass to the structure of STB 11 usefulness, then acceptance division 250 can be given sending part 230 with the message transmission that whether has the pattern that clock line is used as data wire.Also can transmit the necessary temporal information of clock cycle of extracting initial setting equally.In addition, if, then also can transmit the information that initial setting finishes to sending part 230 from acceptance division 250 with bidirectional line shown in Figure 2 209.
Embodiment 3
Fig. 5 is the block diagram of expression an alternative embodiment of the invention.Present embodiment is in system configuration shown in Figure 1, and sending part 117 and acceptance division 127 are changed to the sending part 240 among Fig. 4 and the embodiment of acceptance division 260 respectively.The structural element identical with embodiment shown in Figure 4 is marked with identical numbering.In the present embodiment, PLL portion shown in Figure 4 also is necessary as structural element, but has omitted record in order to simplify accompanying drawing.And in the present embodiment,, input circuit 255, multiplexed lsb decoder 265, multiplexed encoding section 258 and output circuit 257 have been appended to embodiment shown in Figure 4.
In Fig. 5, be characterised in that when sending data to have and be not from STB 11, but send the function of data on the contrary from TV 12 to STB 11 to TV 12 with clock line.Under initial condition, output circuit 257 is disconnection (OFF) state, and is identical with embodiment shown in Figure 4, transmits data and clocks from the sending part 240 of STB 11 to acceptance division 260.After the Clock Extraction work of each data began, clock line also became the state that can send data.At this constantly, make output circuit 244 be off-state after, output circuit 257 is started working, with data from the acceptance division 260 anti-sending parts 240 of giving.At this moment, if make the clock cycle become the clock cycle identical, then similarly can extract clock with this anti-clock line that send with other data wires with initial condition.Certainly, during sending data, can continue to send image data from sending part 240 to acceptance division 260 with data wire with clock line.
Fig. 6 is illustrated in the system configuration shown in Figure 1, an example of the signal of video signal stream when using this reverse data-transformation facility.The reverse transfer of data of TV 12 by being made of this clock line sends the compressing image signal that is recorded in the storage part 128 to STB 11, and the TS/PS transformation component 112 and the lsb decoder 113 that utilize STB 11 to be had are decoded to non-compressing image signal.Then, can in display part 129, show image by the anti-TV 12 that gives of data wire based on this decoded signal of video signal.In addition, then same if also be necessary the OSD of displayed record in storage part, can utilize clock line to send to the osd circuit of STB 11, utilize the synthetic portion 114 of image to carry out image and synthesize with non-compressing image signal, send to TV 12.
Utilize this function, even do not have the TV of lsb decoder, the signal of video signal of the displayed record of also regenerating in storage part carries out audiovisual.Even have the TV of lsb decoder, when its lsb decoder and the employed coded system of compressing image not at once, also can adopt same procedure.And, for employed decoding process, if TV when selling the high compression broadcasting etc. of non-existent new coded system, even under the situation that high compression broadcasting like this etc. begins to use, also has the advantage that to use writing function and the passage of time audiovisual function of TV.In addition; not only for coding, though utilize TV to adopt this TV under the compressing image of the not corresponding copyright protection mode situation about writing down, if STB is corresponding to this mode; then also the compressing image signal of record can be sent to STB, carry out copyright protection and handle and decoding processing.Same as described above then, copyright protection will be handled and the signal of video signal of decoding processing is given TV side as non-compressing image signal is counter by having carried out, and thus, can carry out the demonstration based on the image of this signal of video signal.
Secondly, one example of the circuit structure of input circuit shown in Figure 5 254,255 and output circuit 244,257 has been shown among Fig. 7.Before key diagram 7, the board structure example of input circuit shown in Figure 8 and output circuit illustrates its work earlier.Output circuit 31 comprises: output control part 311, transistor 312,313 and constant current source 314, input circuit 32 comprises: terminal resistance 336,337 and differential judging part 338.
The structure of Fig. 7 is used the structure of input circuit and output circuit shown in Figure 8 in the same old way, is to be connected in parallel.Because two output circuits that are connected in parallel are action simultaneously not, do not control so be not in the output control part 331 (or 311) of the output circuit of operate condition, so that transistor 312 and 313 (or transistor 332 and 333) forms OFF-ON.Input circuit also can make both sides all be operate condition, also can will not use the terminal resistance 316,317 (or 336,337) of side to cut off.In addition, the action of differential judging part 318 (or 338) is stopped, to reduce power consumption.
Embodiment 4
Fig. 9 is the block diagram of expression an alternative embodiment of the invention, uses two TV 15 and 16 as image processor.That is, in the present embodiment, make STB shown in Figure 1 11 become TV with display part.Identical with embodiment shown in Figure 1, by image interface 104, send the multiplexed multiplexed signal of video signal that non-compressing image signal and compressing image signal are arranged to TV 16 from TV15, utilize the display part 129 of TV 16 to show non-compressing image signal.On the other hand, utilize storage part 128 recording compressed images,, and utilize display part 129 to show in the desirable time regeneration of user.
A structure example of receiving and transmitting part 157 and 167 has been shown among Figure 10.In this embodiment, data wire 271 and clock line 274 both can both transmitted in both directions.Concrete input circuit also can be identical with Fig. 7 with the structure of output circuit.Under 167 transmission data conditions, data via output circuit 241, are supplied to input circuit 251 and multiplexed lsb decoder 261 from multiplexed encoding section 231 from receiving and transmitting part 157.On the other hand, clock signal via output circuit 244, is supplied to input circuit 254 and PLL 283 from clock supply unit 235.Otherwise, transmitting under the data conditions to 157 from receiving and transmitting part 167, data via output circuit 281, are supplied to input circuit 271 and multiplexed lsb decoder 272 from multiplexed encoding section 282.On the other hand, clock signal via output circuit 257, is supplied to input circuit 255 and PLL274 from clock supply unit 284.
As above, in TV 15 or 16, if having the function of reverse transfer signal of video signal, then following action.That is, shown in the dotted line among Fig. 9, the compressing image by storage part 128 record of TV 16 can be transferred to TV 15, form non-compressing image signal by TS/PS transformation component 152 and the lsb decoder 153 of TV 15, and by display part 159 demonstrations.Certainly, be transferred to TV15 after also can utilizing the TS/PS transformation component 122 of TV 16 and lsb decoder 123 to form non-compressing image signal, and show by display part 159.
According to present embodiment, can make the various resources of digital tuner, storage part, lsb decoder and copyright protection, circulation between interconnected two TV (image processor).
In above embodiment, though show the example of STB and TV as image processor, the also same effect of expectability in the combination of the signal of video signal source of recorder or DVD player etc. and monitor etc.
If adopt the above embodiments of the present invention that describe in detail, then in an interface, can transmit the real-time non-compressing image signal of not subpackage and the compressing image signal after the subpackage simultaneously.That is,, just can transmit a plurality of digital image signals that use different mutually specifications with an interface.In the image processors such as TV that use it, can be on one side show non-compressing image signal in real time from signal sources such as STB at the display part of TV, the compressing image signal record that will transmit simultaneously carries out audiovisual in the other time in being built in the storage devices such as HDD of TV on one side.In other words, can on a picture, show the real-time image of certain presentation content and the image of passage of time simultaneously,, can realize real-time audiovisual and passage of time audiovisual for this presentation content.
In addition, be applied to transfer of data by the physical layer that makes non-compressing image coffret can carry out high-speed transfer, do not needing to transmit under the situation of non-compressing image signal the effect that also has the transmission that to carry out a plurality of compressing image signals or carry out the image transmission in the short time.
In addition, according to above-mentioned execution mode, can be suitably corresponding with various copyright protection technologies, also have the effect that can under proper service condition, obtain good audiovisual.
The possibility of industrial utilization
The present invention is applicable to, to compressing image signal and non-compressing image signal carry out multiplexed after, utilize the transmission method of the signal of video signal that an interface transmits.Between image processor, for example between image displays such as signal of video signal sources such as STB and TV, carry out under the situation of transmitting-receiving of signal of video signal effective especially.
More than, several embodiments according to the present invention is illustrated, but well-known, can in not departing from scope of the present invention, carry out multiple modification.Therefore, scope of the present invention should not be limited to described specific embodiment, and should judge whether above-mentioned modification falls into the described scope of claim of the present invention.
Claims (20)
1. an image signal transmission method is characterized in that, comprises the following steps:
Utilize decoder that the compressing image signal of input image signal processor is decoded, generate the step of non-compressing image signal;
On the part of the retrace interval of the non-compressing image signal of described generation, the step of multiplexed compressing image signal; And
Send the step of described multiplexed signal of video signal from described image signal processor.
2. an image signal transmission method is characterized in that, comprises the following steps:
Utilize image signal processor, on the non-compressing image signal of the not subpackage that comprises synchronizing signal, the step of the compressing image signal after the multiplexed subpackage; And
Send the step of described multiplexed signal of video signal from described image signal transmitting device.
3. image signal transmission method as claimed in claim 2 is characterized in that: described compressing image signal is transport stream or program flow, an one packet is divided into a plurality of packets again, and adds identiflication number respectively on the packet header of this partition data bag.
4. image signal transmission method as claimed in claim 2, it is characterized in that: under situation about making a mistake in the packet that is being multiplexed on the described multiplexed signal of video signal, by being connected the communication line on the described image signal transmitting device, specify this packet that makes a mistake, and to described image signal transmitting device request repeat.
5. image signal transmission method as claimed in claim 2 is characterized in that: the packet header of described packet or pay(useful) load comprise the copy flag that is different from described non-compressing image signal.
6. image processor is characterized in that having:
Input part, input is to the multiplexed multiplexed signal of video signal that the compressing image signal is arranged of the non-compressing image signal of not subpackage;
Separated part from the signal of video signal that inputs to described input part, is separated non-compressing image signal and compressing image signal; And
Display part, can show based on by described separating part from the image of non-compressing image signal.
7. image processor as claimed in claim 6 is characterized in that: the image store portion that also has the compressing image that record separates by described separated part.
8. image processor as claimed in claim 6, it is characterized in that, can show below two pictures at described display part: first image of the signal of video signal behind the compressing image signal that obtains from described multiplexed signal of video signal based on decoding and based on second image of the non-compressing image that obtains from described multiplexed signal of video signal.
9. image processor as claimed in claim 6 is characterized in that: also have the efferent that is used for exporting to the outside compressing image signal that is separated by described separated part.
10. image processor as claimed in claim 7 is characterized in that: also have, receive the digital tuner of the digital broadcast signal that comprises the compressing image signal and the lsb decoder that the compressing image signal that is received by this digital tuner is decoded; Described lsb decoder also can be used for the compressing image signal of reading from described image store portion is decoded.
11. image processor as claimed in claim 7 is characterized in that: also have, carry out the transcoding, coding transform portion of transcoding, coding transform to being recorded in compressing image signal in the described image store portion; With the sending part that sends the signal of video signal after carrying out transcoding, coding transform by this transcoding, coding transform portion to external device (ED).
12. an image signal processor is characterized in that having:
Decoder is decoded to the compressing image signal of input, generates non-compressing image signal;
The multiplexed portion of signal of video signal, multiplexed compressing image signal on the non-compressing image signal that generates by described decoder; With
Sending part sends by multiplexed of described signal of video signal the signal of video signal after multiplexed.
13. an image processor is characterized in that having:
Interface portion is used to utilize data wire to send or the reception signal of video signal, and utilizes clock line to send or the receive clock signal; With
Switching part, the signal as utilizing described clock line to send or receive switches described clock signal and signal of video signal.
14. image processor as claimed in claim 13, it is characterized in that: described interface portion is passed through described clock line to external device (ED) tranmitting data register signal, after the preparation end of this external device (ED) according to this clock signal, as the signal that utilizes described clock line to send or receive, described switching part switches to signal of video signal from described clock signal.
15. image processor as claimed in claim 13 is characterized in that: the transmission direction of the signal of video signal in the described clock line is, with the opposite direction of transmission direction of signal of video signal in the described data wire.
16. an image processor is characterized in that having:
To the signal of video signal that sends or receive by interface, implement a plurality of encryption portion of multiple encryption; With
Be used to select any one selection portion of described a plurality of encryption portion.
17. image processor as claimed in claim 16 is characterized in that: the change indication after the response of described selection portion is encrypted from the user, and carry out the selection of described encryption portion.
18. image processor as claimed in claim 16, it is characterized in that: can input or output and make non-compressing image signal and compressing image signal carry out multiplexed signal of video signal after multiplexed, in described non-compressing image signal and described compressing image signal, use shared encryption.
19. an image signal processor is characterized in that having:
The compressing image signal that is input in the interface portion is decoded, generate the decoder of non-compressing image signal; With
By the anti-sending part that send the non-compressing image signal that generates by described lsb decoder of described interface portion.
20. an image signal processor is characterized in that having:
The interface portion exported of compressing image signal to input or storage; With the display part that the non-compressing image signal by described interface portion input is shown.
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| US20060291569A1 (en) | 2006-12-28 |
| US20180146234A1 (en) | 2018-05-24 |
| CN100581254C (en) | 2010-01-13 |
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| US20240080513A1 (en) | 2024-03-07 |
| US11297375B2 (en) | 2022-04-05 |
| US11863812B2 (en) | 2024-01-02 |
| US10750227B2 (en) | 2020-08-18 |
| US20120147904A1 (en) | 2012-06-14 |
| JP5082209B2 (en) | 2012-11-28 |
| US8130794B2 (en) | 2012-03-06 |
| US9906828B2 (en) | 2018-02-27 |
| US20220272403A1 (en) | 2022-08-25 |
| CN101547330A (en) | 2009-09-30 |
| US20200344514A1 (en) | 2020-10-29 |
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